About "Cross Flow Fan", cross-flow fan insulation class refers to its heat-resistant grade of insulating material, points A, E, B, F, H grade. Allowable temperature rise refers to the limits of the motor temperature and the ambient temperature is elevated compared. In the cross-flow fan motors and other electrical equipment, the insulating material is the weakest link. Insulation materials are particularly susceptible to high temperatures and accelerated aging and damage. Different heat insulation performance differences, the ability to use different insulating materials to withstand high temperatures of electrical equipment which have different. Electrical equipment is generally stipulate a maximum temperature of its work.